/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */

package org.apache.poi.hwpf.usermodel;

import java.util.ArrayList;
import java.util.List;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.poi.hwpf.sprm.SprmBuffer;
import org.apache.poi.hwpf.sprm.TableSprmUncompressor;

import static org.apache.logging.log4j.util.Unbox.box;

public final class TableRow extends Range
{
    private static final Logger LOG = LogManager.getLogger(TableRow.class);

    private static final short SPRM_DXAGAPHALF = (short) 0x9602;
    private static final short SPRM_DYAROWHEIGHT = (short) 0x9407;
    private static final short SPRM_FCANTSPLIT = 0x3403;
    private static final short SPRM_FTABLEHEADER = 0x3404;
    private static final short SPRM_TJC = 0x5400;

    private static final char TABLE_CELL_MARK = '\u0007';

    private TableCell[] _cells;
    private boolean _cellsFound;

    int _levelNum;
    private SprmBuffer _papx;
    private TableProperties _tprops;

    public TableRow( int startIdxInclusive, int endIdxExclusive, Table parent,
            int levelNum )
    {
        super( startIdxInclusive, endIdxExclusive, parent );

        Paragraph last = getParagraph( numParagraphs() - 1 );
        _papx = last._papx;
        _tprops = TableSprmUncompressor.uncompressTAP( _papx );
        _levelNum = levelNum;
        initCells();
    }

    public boolean cantSplit()
    {
        return _tprops.getFCantSplit();
    }

    public BorderCode getBarBorder()
    {
        throw new UnsupportedOperationException( "not applicable for TableRow" );
    }

    public BorderCode getBottomBorder()
    {
        return _tprops.getBrcBottom();
    }

    public TableCell getCell( int index )
    {
        initCells();
        return _cells[index];
    }

    public int getGapHalf()
    {
        return _tprops.getDxaGapHalf();
    }

    public BorderCode getHorizontalBorder()
    {
        return _tprops.getBrcHorizontal();
    }

    public BorderCode getLeftBorder()
    {
        return _tprops.getBrcLeft();
    }

    public BorderCode getRightBorder()
    {
        return _tprops.getBrcRight();
    }

    public int getRowHeight()
    {
        return _tprops.getDyaRowHeight();
    }

    public int getRowJustification()
    {
        return _tprops.getJc();
    }

    public BorderCode getTopBorder()
    {
        return _tprops.getBrcTop();
    }

    public BorderCode getVerticalBorder()
    {
        return _tprops.getBrcVertical();
    }

    private void initCells()
    {
        if ( _cellsFound )
            return;

        final short expectedCellsCount = _tprops.getItcMac();

        int lastCellStart = 0;
        List<TableCell> cells = new ArrayList<>(
                expectedCellsCount + 1);
        for ( int p = 0; p < numParagraphs(); p++ )
        {
            Paragraph paragraph = getParagraph( p );
            String s = paragraph.text();

            if ( ( ( s.length() > 0 && s.charAt( s.length() - 1 ) == TABLE_CELL_MARK ) || paragraph
                    .isEmbeddedCellMark() )
                    && paragraph.getTableLevel() == _levelNum )
            {
                TableCellDescriptor tableCellDescriptor = _tprops.getRgtc() != null
                        && _tprops.getRgtc().length > cells.size() ? _tprops
                        .getRgtc()[cells.size()] : new TableCellDescriptor();
                final short leftEdge = _tprops.getRgdxaCenter() != null
                        && _tprops.getRgdxaCenter().length > cells.size() ? _tprops
                        .getRgdxaCenter()[cells.size()] : 0;
                final short rightEdge = _tprops.getRgdxaCenter() != null
                        && _tprops.getRgdxaCenter().length > cells.size() + 1 ? _tprops
                        .getRgdxaCenter()[cells.size() + 1] : 0;

                TableCell tableCell = new TableCell( getParagraph(
                        lastCellStart ).getStartOffset(), getParagraph( p )
                        .getEndOffset(), this, _levelNum, tableCellDescriptor,
                        leftEdge, rightEdge - leftEdge );
                cells.add( tableCell );
                lastCellStart = p + 1;
            }
        }

        if ( lastCellStart < ( numParagraphs() - 1 ) )
        {
            TableCellDescriptor tableCellDescriptor = _tprops.getRgtc() != null
                    && _tprops.getRgtc().length > cells.size() ? _tprops
                    .getRgtc()[cells.size()] : new TableCellDescriptor();
            final short leftEdge = _tprops.getRgdxaCenter() != null
                    && _tprops.getRgdxaCenter().length > cells.size() ? _tprops
                    .getRgdxaCenter()[cells.size()] : 0;
            final short rightEdge = _tprops.getRgdxaCenter() != null
                    && _tprops.getRgdxaCenter().length > cells.size() + 1 ? _tprops
                    .getRgdxaCenter()[cells.size() + 1] : 0;

            TableCell tableCell = new TableCell( lastCellStart,
                    ( numParagraphs() - 1 ), this, _levelNum,
                    tableCellDescriptor, leftEdge, rightEdge - leftEdge );
            cells.add( tableCell );
        }

        // sometimes there are "fake" cells which we need to exclude
        if ( !cells.isEmpty() && cells.size() != expectedCellsCount )
        {
            TableCell lastCell = cells.get( cells.size() - 1 );
            if ( lastCell.numParagraphs() == 1
                    && ( lastCell.getParagraph( 0 ).isTableRowEnd() ) )
            {
                // remove "fake" cell
                cells.remove( cells.size() - 1 );
            }
        }

        if ( cells.size() != expectedCellsCount )
        {
            LOG.atWarn().log("Number of found table cells ({}) for table row [{}c; {}c] not equals to stored property value {}",
                    cells.size(), box(getStartOffset()),box(getEndOffset()),box(expectedCellsCount));
            _tprops.setItcMac( (short) cells.size() );
        }

        _cells = cells.toArray(new TableCell[0]);
        _cellsFound = true;
    }

    public boolean isTableHeader()
    {
        return _tprops.getFTableHeader();
    }

    public int numCells()
    {
        initCells();
        return _cells.length;
    }

    @Override
    protected void reset()
    {
        _cellsFound = false;
    }

    public void setCantSplit( boolean cantSplit )
    {
        _tprops.setFCantSplit( cantSplit );
        _papx.updateSprm( SPRM_FCANTSPLIT, (byte) ( cantSplit ? 1 : 0 ) );
    }

    public void setGapHalf( int dxaGapHalf )
    {
        _tprops.setDxaGapHalf( dxaGapHalf );
        _papx.updateSprm( SPRM_DXAGAPHALF, (short) dxaGapHalf );
    }

    public void setRowHeight( int dyaRowHeight )
    {
        _tprops.setDyaRowHeight( dyaRowHeight );
        _papx.updateSprm( SPRM_DYAROWHEIGHT, (short) dyaRowHeight );
    }

    public void setRowJustification( int jc )
    {
        _tprops.setJc( (short) jc );
        _papx.updateSprm( SPRM_TJC, (short) jc );
    }

    public void setTableHeader( boolean tableHeader )
    {
        _tprops.setFTableHeader( tableHeader );
        _papx.updateSprm( SPRM_FTABLEHEADER, (byte) ( tableHeader ? 1 : 0 ) );
    }

}